1
a stupid noise you make when you're too lazy to think of anything real to say.
'Gaigai... uh... what's your name again?', said to a guy you just met at a bar.
'Gaigai... is this a real conversation?', said to your best friend during a boring Zoom call.
'Gaigai... like, literally, what?', said to your mom when she asked why you're late again.